349 lines
12 KiB
C
349 lines
12 KiB
C
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/**********************************************************************
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* $Id$ lpc177x_8x_pinsel.c 2011-06-02
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*//**
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* @file lpc177x_8x_pinsel.c
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* @brief Contains all functions support for Pin-connection block
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* firmware library on LPC177x_8x
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* @version 1.0
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* @date 02. June. 2011
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* @author NXP MCU SW Application Team
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*
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* Copyright(C) 2011, NXP Semiconductor
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* All rights reserved.
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*
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***********************************************************************
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* Software that is described herein is for illustrative purposes only
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* which provides customers with programming information regarding the
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* products. This software is supplied "AS IS" without any warranties.
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* NXP Semiconductors assumes no responsibility or liability for the
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* use of the software, conveys no license or title under any patent,
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* copyright, or mask work right to the product. NXP Semiconductors
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* reserves the right to make changes in the software without
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* notification. NXP Semiconductors also make no representation or
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* warranty that such application will be suitable for the specified
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* use without further testing or modification.
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**********************************************************************/
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/* Peripheral group ----------------------------------------------------------- */
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/** @addtogroup PINSEL
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* @{
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*/
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/* Includes ------------------------------------------------------------------- */
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#include "lpc177x_8x_pinsel.h"
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#define PINSEL_I2C_MODE_POS (8)
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#define PINSEL_I2C_MODE_NUMBITS (2)
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#define PINSEL_I2C_MODE_BITMASK (0x03)
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#define PINSEL_BASIC_MODE_POS (3)
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#define PINSEL_BASIC_MODE_NUMBITS (2)
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#define PINSEL_BASIC_MODE_BITMASK (0x03)
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#define PINSEL_DACEN_POS (16)
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#define PINSEL_DACEN_BITMASK (0x01)
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#define PINSEL_DACEN_NUMBITS (1)
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#define PINSEL_GLITCH_FILTER_POS (8)
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#define PINSEL_GLITCH_FILTER_BITMASK (0x01)
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#define PINSEL_GLITCH_FILTER_NUMBITS (1)
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#define PINSEL_ADMODE_POS (7)
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#define PINSEL_ADMODE_BITMASK (0x01)
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#define PINSEL_ADMODE_NUMBITS (1)
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/* Private Functions ---------------------------------------------------------- */
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/*********************************************************************//**
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* @brief Get pointer to GPIO peripheral due to GPIO port
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* @param[in] portnum Port Number value, should be in range from 0..3.
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* @param[in] pinnum Pin number value, should be in range from 0..31
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* @return Pointer to GPIO peripheral
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**********************************************************************/
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static uint32_t * PIN_GetPointer(uint8_t portnum, uint8_t pinnum)
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{
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uint32_t *pPIN = NULL;
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pPIN = (uint32_t *)(LPC_IOCON_BASE + ((portnum * 32 + pinnum)*sizeof(uint32_t)));
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return pPIN;
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}
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/* Public Functions ----------------------------------------------------------- */
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/** @addtogroup PINSEL_Public_Functions
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* @{
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*/
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/*********************************************************************//**
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* @brief Setup the pin selection function
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* @param[in] portnum PORT number, should be in range: 0..3
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* @param[in] pinnum Pin number, should be in range: 0..31
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* @param[in] funcnum Function number, should be range: 0..7
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* - 0: Select GPIO (Default)
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* - 1: Selects the 1st alternate function
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* - 2: Selects the 2nd alternate function
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* ...
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* - 7: Selects the 7th alternate function
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* @return None
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**********************************************************************/
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void PINSEL_ConfigPin ( uint8_t portnum, uint8_t pinnum, uint8_t funcnum)
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{
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uint32_t *pPIN = NULL;
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pPIN = PIN_GetPointer(portnum, pinnum);
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*pPIN &= 0x00000007;//Clear function bits
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*pPIN |= funcnum;
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}
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/*********************************************************************//**
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* @brief Setup resistor mode for each pin
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* @param[in] portnum PORT number, should be in range: 0..3
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* @param[in] pinnum Pin number, should be in range: 0..31
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* @param[in] modenum: Mode number, should be in range: 0..3
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- IOCON_MODE_PLAIN: Plain output
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- IOCON_MODE_PULLDOWN: Pull-down enable
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- IOCON_MODE_PULLUP: Pull-up enable
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- IOCON_MODE_REPEATER: Repeater mode
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* @return None
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**********************************************************************/
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void PINSEL_SetPinMode ( uint8_t portnum, uint8_t pinnum, PinSel_BasicMode modenum)
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{
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uint32_t *pPIN = NULL;
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pPIN = PIN_GetPointer(portnum, pinnum);
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*(uint32_t *)pPIN &= ~(3<<3);//Clear function bits
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*(uint32_t *)pPIN |= modenum;
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}
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/*********************************************************************//**
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* @brief Setup hysteresis for each pin
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* @param[in] portnum Port number, should be in range: 0..3
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* @param[in] pinnum Pin number, should be in range: 0..31
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* @param[in] NewState new state of Hysteresis mode, should be:
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* - ENABLE: Hysteresis enable
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* - DISABLE: Hysteresis disable
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* @return None
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**********************************************************************/
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void PINSEL_SetHysMode(uint8_t portnum, uint8_t pinnum, FunctionalState NewState)
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{
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uint32_t *pPIN = NULL;
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pPIN = PIN_GetPointer(portnum, pinnum);
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if(NewState == DISABLE)
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{
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*(uint32_t *)pPIN &= ~IOCON_HYS;//Clear hys bits
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}
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else
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*(uint32_t *)pPIN |= IOCON_HYS;
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}
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/*********************************************************************//**
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* @brief Setup Slew rate for each pin
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* @param[in] portnum Port number, should be in range: 0..3
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* @param[in] pinnum Pin number, should be in range: 0..31
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* @param[in] NewState new state of Slew rate control, should be:
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* - ENABLE: Output slew rate control is enable
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* - DISABLE: Output slew rate control is disable
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* @return None
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**********************************************************************/
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void PINSEL_SetSlewMode(uint8_t portnum, uint8_t pinnum, FunctionalState NewState)
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{
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uint32_t *pPIN = NULL;
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pPIN = PIN_GetPointer(portnum, pinnum);
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if(NewState == DISABLE)
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{
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*(uint32_t *)pPIN &= ~IOCON_SLEW;//Clear hys bits
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}
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else
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*(uint32_t *)pPIN |= IOCON_SLEW;
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}
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/*********************************************************************//**
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* @brief Setup Input Buffer for each pin
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* @param[in] portnum Port number, should be in range: 0..3
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* @param[in] pinnum Pin number, should be in range: 0..31
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* @param[in] NewState new state of Input buffer mode, should be:
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* - ENABLE: The input buffer is enable
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* - DISABLE: The input buffer is disable
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* @return None
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**********************************************************************/
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void PINSEL_SetInBufMode(uint8_t portnum, uint8_t pinnum, FunctionalState NewState)
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{
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uint32_t *pPIN = NULL;
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pPIN = PIN_GetPointer(portnum, pinnum);
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if(NewState == DISABLE)
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{
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*(uint32_t *)pPIN &= ~IOCON_INBUF;//Clear hys bits
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}
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else
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*(uint32_t *)pPIN |= IOCON_INBUF;
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}
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/*********************************************************************//**
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* @brief Setup I2CMode for only pins that provide special I2C functionality
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* @param[in] portnum Port number, should be in range: 0..3
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* @param[in] pinnum Pin number, should be in range: 0..31
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* @param[in] I2CMode I2C mode, should be:
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* - IOCON_I2CMODE_FAST: Fast mode and standard I2C mode
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* - IOCON_I2CMODE_OPENDRAIN: Open drain I/O
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* - IOCON_I2CMODE_FASTPLUS: Fast Mode Plus I/O
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* - IOCON_I2CMODE_HIGHOPENDRAIN: High drive open drain I/O
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* @return None
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**********************************************************************/
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void PINSEL_SetI2CMode(uint8_t portnum, uint8_t pinnum, PinSel_I2cMode I2CMode)
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{
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uint32_t *pPIN = NULL;
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pPIN = PIN_GetPointer(portnum, pinnum);
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*(uint32_t *)pPIN &= ~(PINSEL_I2C_MODE_BITMASK<< PINSEL_I2C_MODE_POS);
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*(uint32_t *)pPIN |= (I2CMode << PINSEL_I2C_MODE_POS);
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}
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/*********************************************************************//**
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* @brief Setup Open-drain mode in each pin
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* @param[in] portnum Port number, should be in range: 0..3
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* @param[in] pinnum Pin number, should be in range: 0..31
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* @param[in] NewState new state of Open-drain mode:
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* - DISABLE: Normal pin I/O mode
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* - ENABLE: Open-drain enable
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* @return None
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**********************************************************************/
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void PINSEL_SetOpenDrainMode(uint8_t portnum, uint8_t pinnum, FunctionalState NewState)
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{
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uint32_t *pPIN = NULL;
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pPIN = PIN_GetPointer(portnum, pinnum);
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if(NewState == DISABLE)
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{
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*(uint32_t *)pPIN &= ~IOCON_ODMODE;//Clear hys bits
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}
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else
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{
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*(uint32_t *)pPIN |= IOCON_ODMODE;
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}
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}
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/*********************************************************************//**
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* @brief Enable the Analog mode for each pin (default is as Digital pins)
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* @param[in] portnum PORT number, should be in range: 0..3
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* @param[in] pinnum Pin number, should be in range: 0..31
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* @param[in] enable: the state of the pin that is expected to run
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- ENABLE: Enable the DAC mode of the pin
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- DISABLE: Disable the DAC mode
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* @return None
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**********************************************************************/
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void PINSEL_SetAnalogPinMode (uint8_t portnum, uint8_t pinnum, uint8_t enable)
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{
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uint32_t *pPIN = NULL;
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uint8_t condition = 0;
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condition = ((portnum == 0) && (pinnum == 12)) || ((portnum == 0) && (pinnum == 13))
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| ((portnum == 0) && (pinnum <= 26) && (pinnum >= 23))
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| ((portnum == 1) && (pinnum == 30)) || ((portnum == 1) && (pinnum == 31));
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if(!condition)
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{
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return;
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}
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pPIN = PIN_GetPointer(portnum, pinnum);
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//Clear this bit to set the pin to Analog mode
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*(uint32_t *)pPIN &= ~(PINSEL_ADMODE_BITMASK << PINSEL_ADMODE_POS);
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if(enable)
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{
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}
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else
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{
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*(uint32_t *)pPIN |= (1 << PINSEL_ADMODE_POS);//Set 16th bit to one
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}
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return;
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}
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/*********************************************************************//**
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* @brief Choose the DAC mode for each pin
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* @param[in] portnum PORT number, should be in range: 0..3
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* @param[in] pinnum Pin number, should be in range: 0..31
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* @param[in] enable: the state of the pin that is expected to run
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- ENABLE: Enable the DAC mode of the pin
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- DISABLE: Disable the DAC mode
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* @return None
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**********************************************************************/
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void PINSEL_DacEnable (uint8_t portnum, uint8_t pinnum, uint8_t enable)
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{
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uint32_t *pPIN = NULL;
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// This setting is only for DAC pin (output pin)
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if(!((portnum == 0) && (pinnum == 26)))
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{
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return;
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}
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pPIN = PIN_GetPointer(portnum, pinnum);
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//Clear DAC Enable function bits
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*(uint32_t *)pPIN &= ~(PINSEL_DACEN_BITMASK << PINSEL_DACEN_POS);
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if(enable)
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{
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*(uint32_t *)pPIN |= (1 << PINSEL_DACEN_POS);//Set 16th bit to one
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}
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else
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{
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}
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return;
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}
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/*********************************************************************//**
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* @brief Control the glitch filter for each pin
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* @param[in] portnum PORT number, should be in range: 0..3
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* @param[in] pinnum Pin number, should be in range: 0..31
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* @param[in] enable: the state of the pin that is expected to run
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- ENABLE: The noise pulses below approximately 10ns are filtered out
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- DISABLE: No input filtering is done.
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* @return None
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**********************************************************************/
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void PINSEL_SetFilter (uint8_t portnum, uint8_t pinnum, uint8_t enable)
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{
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uint32_t *pPIN = NULL;
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// This setting is only for DAC pin (output pin)
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if(!((portnum == 0) && ((pinnum == 7) || (pinnum == 8) || (pinnum == 9))))
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{
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return;
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}
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pPIN = PIN_GetPointer(portnum, pinnum);
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*(uint32_t *)pPIN |= (1 << 7);//Set 7th bit for normal operation following the UM1.0
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//Clear Filter bits
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*(uint32_t *)pPIN &= ~(PINSEL_GLITCH_FILTER_BITMASK << PINSEL_GLITCH_FILTER_POS);
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if(!enable)
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{
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*(uint32_t *)pPIN |= (1 << PINSEL_GLITCH_FILTER_POS);//Set 8th bit to one
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}
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else
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{
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}
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*pPIN = *pPIN;
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return;
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}
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/**
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* @}
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*/
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/**
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* @}
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*/
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/* --------------------------------- End Of File ------------------------------ */
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